Start with the Season, Not the Shopping List

Event catering lives or dies on timing, and so do vegetables. When you build a menu around British seasonal produce, you get better flavour, better value and a story that guests remember. A tomato in January is a pale, watery shadow of the one you will serve in August. Asparagus in May is sweet and tender; asparagus in December is expensive and disappointing. Before you write the menu, check what is abundant. Then let that ingredient lead.

It works for a 120-guest wedding breakfast and a standing corporate reception. It also keeps costs down, because peak-season crops are plentiful. Below is a year-long framework with ideas for weddings, parties and corporate occasions.

Spring: Asparagus, Peas and the First Tender Leaves

Spring is brief and precious in the British kitchen. Asparagus arrives in late April and runs to June. Serve it simply: grilled with lemon and olive oil, shaved raw into salads, or wrapped in filo for a smart vegetarian canapé. Peas, broad beans, radishes, spinach, watercress and spring onions all hit their best in these weeks. Purple sprouting broccoli bridges late winter and early spring, magnificent charred with chilli and garlic.

• Weddings: pea and mint soup served in small glasses; asparagus spears with a soft-poached hen's egg and hollandaise.
• Parties: radish and whipped butter tartines; broad bean crostini with ricotta and lemon zest.
• Corporate: charred asparagus and quinoa salad; spinach and feta filo parcels for a working lunch.

Use every part. Asparagus stems that are too woody for a plated dish can be blitzed into soup or folded into a risotto. Pea pods make a delicate stock. At peak, the price drops enough to serve these vegetables generously rather than as a garnish.

Early Summer: Soft Fruits, Salad Leaves and Sweet Peas

By June, the British soft fruit season is underway. Strawberries, raspberries, cherries and gooseberries appear, often within days. These are not only for desserts. Strawberries with a crack of black pepper and a splash of balsamic make a striking starter or cheese-course accompaniment. Raspberries crushed into a vinaigrette lift a bitter leaf salad. Gooseberries stewed with elderflower are a classic partner for mackerel or pork.

Salad leaves are at their most varied now: little gem, rocket, mizuna, sorrel and purslane. New potatoes, broad beans and sweet peas are sweet and cheap. For large events, avoid delicate leaves that wilt under heat lamps. Choose robust leaves and dress them at the last moment.

• Weddings: strawberry and basil skewers; raspberry ripple Eton mess served in vintage glasses.
• Parties: broad bean and mint dip with flatbreads; new potato salad with mustard and chives.
• Corporate: grilled halloumi with gooseberry compote; mixed leaf salad with toasted seeds.

High Summer: Tomatoes, Courgettes, Sweetcorn and Aubergines

This is the moment British vegetables can carry a whole menu. Tomatoes are deep red, fragrant and full of sugar. Courgettes are tiny and firm, with edible flowers if you ask your grower. Sweetcorn is milky and crisp. Aubergines and peppers finally taste of sunshine rather than water. Use them boldly.

For a wedding, a platter of heritage tomatoes with salt, olive oil and torn basil needs nothing else. For a party, chargrilled corn on the cob with lime and smoked paprika is always popular. For corporate catering, a roasted courgette and aubergine lasagne holds well and pleases vegetarians and meat-eaters alike. If you have a glut, make chutney, passata or ratatouille to freeze.

• Weddings: tomato tart with thyme and goat's cheese; courgette ribbon salad with pine nuts.
• Parties: sweetcorn fritters with avocado and lime; stuffed courgette flowers.
• Corporate: roasted pepper and aubergine mezze; tomato and bread salad with capers.

Autumn: Brassicas, Squash and Earthy Roots

As the nights draw in, British brassicas and roots come into their own. Kale, cavolo nero, cabbage, Brussels sprouts, leeks, squash, beetroot, carrots and parsnips are all abundant. Roasting concentrates their sweetness and makes them ideal for buffet service. Shaved raw Brussels sprouts with lemon and pecorino make a brilliant autumn slaw. Beetroot works in earthy brownies, cured fish and pickles.

This is the season for comfort without stodge. A root vegetable Wellington is a showstopper for a wedding. Spiced squash soup in cups is perfect for a corporate reception. For parties, try parsnip crisps with a blue cheese dip, or beetroot and goat's cheese tartlets.

• Weddings: roasted squash and sage risotto; beetroot carpaccio with horseradish cream.
• Parties: kale and cheddar arancini; charred hispi cabbage with miso butter.
• Corporate: celeriac and apple soup; warm root vegetable salad with lentils.

Winter: Roots, Forced Rhubarb and Stored Crops

Winter vegetables are often misunderstood. They are not a punishment; they are a quiet luxury. Parsnips, swede, celeriac, Jerusalem artichokes, leeks, kale and sprouts are all at their best after frost. Forced rhubarb from Yorkshire arrives in January and brings a shocking pink brightness to desserts and cocktails. Stored onions, garlic and squash keep the kitchen running through the winter.

Use strong flavours: mustard, horseradish, citrus, hazelnut and smoked paprika. Celeriac remoulade is a smart starter. Parsnip and apple soup is a crowd-pleaser. Sprout tops, often discarded, are sweeter than the sprouts themselves and wonderful simply wilted with butter.

• Weddings: celeriac and truffle gratin; forced rhubarb and custard tart.
• Parties: Jerusalem artichoke soup shots; sprout slaw with pomegranate.
• Corporate: root vegetable rosti with poached egg; leek and potato pasties.

The through-line is simple: buy what is abundant, cook it with respect, and let the calendar write your menu. Your guests will taste the difference, and your budget will thank you.