When the sun is out, no one wants a heavy plate of food. A light summer menu for a garden party or barbecue should feel generous, colourful and effortless, with fresh salads, charred vegetables, delicate fish and fruit puddings. The secret is in the detail: bright dressings, smart chilling and cold dishes that stay safe and appetising all afternoon.

Start with Salads That Hold Their Own

Forget fragile leaves that wilt in the heat. Build your salads around sturdy ingredients: little gem, radicchio, fennel, cucumber, radishes and blanched green beans. Add substance with cooked grains such as pearl barley or quinoa, or pulses like chickpeas. These absorb dressing without turning to mush.

Dress lightly and late. A vinaigrette of olive oil, lemon juice, Dijon mustard and chopped herbs beats a thick, creamy dressing on a hot day. Offer richer sauces on the side. Toss soft herbs—parsley, mint, dill—through just before serving, and add toasted seeds for texture.

• Greek-style salad: ripe tomatoes, cucumber, red onion, olives and feta with oregano and olive oil.
• Courgette ribbon salad: raw courgette ribbons with lemon zest, mint and toasted pine nuts.
• Warm new potato salad: Jersey Royals with a light mustard vinaigrette, spring onions and dill.

Grilled Vegetables with Bright, Light Dressings

The barbecue is not just for meat. Thick slices of aubergine, courgette, peppers, red onion and asparagus take on a lovely char and taste wonderful at room temperature. Brush with olive oil before grilling, then dress while warm with lemon juice, garlic, herbs and a pinch of chilli.

Try grilling spring onions and halved gem lettuce for a smoky surprise. Corn on the cob with lime and chilli butter is always popular. Avoid heavy sauces; finish with good olive oil and a squeeze of citrus. Serve on platters in the shade and replenish from the cool box.

Fresh Fish and Seafood from the Barbecue

Fish is at its best in summer: quick, light and adaptable. Mackerel, sea bass, sardines, prawns and squid all work on the grill. Marinate briefly in olive oil, lemon, garlic and herbs—no more than 30 minutes for delicate fish. Use a fish basket or foil for smaller pieces.

Serve with light sauces: salsa verde, yoghurt and mint, or tomato and basil. Prawn skewers with lime and coriander are ideal finger food. For a corporate occasion, smoked salmon with lemon and dill is elegant and needs no cooking. Keep seafood well chilled until grilling, and never let cooked prawns sit in the sun.

Fruit Desserts That Finish the Meal Lightly

After a savoury spread, fruit feels just right. Think berries, stone fruit and melon rather than heavy sponge. A pavlova topped with whipped cream, Greek yoghurt and berries is a classic. Eton mess, with crushed meringue and macerated berries, is even easier to serve in glasses.

Grilled peaches with honey and rosemary, served with crème fraîche, are outstanding. Watermelon wedges with lime and mint need no cooking. For corporate events, fruit skewers or small glasses of berry compote with yoghurt look smart. Keep desserts cool until serving.

Keeping Cold Dishes Chilled All Afternoon

Food safety matters in the sun. Cold food should stay below 8°C, and anything left out for more than two hours should be thrown away. Use cool boxes, ice baths and shaded tables. Nestle salad bowls inside larger bowls of ice. Freeze water bottles and use them as coolers around platters.

Serve in small batches and replenish from the fridge or cool box. Use shallow containers so food chills quickly. Cover dishes when not being served. Keep mayonnaise-based dishes, seafood and dairy in the coolest spot. If you hire caterers, ask about their chilling plan.

Light Sauces and Condiments That Lift the Plate

Heavy sauces weigh down a summer menu. Build a small collection of bright condiments: lemon and herb vinaigrette, garlicky yoghurt, herb oil and fresh tomato salsa. For barbecued meat or fish, chimichurri of parsley, oregano, garlic, vinegar and olive oil is hard to beat.

Make sauces ahead and store in squeezy bottles or jugs. Keep chilled and set out only what you need for 30 minutes. A squeeze of lime, chopped mint or flaky sea salt transforms a dish without richness. Balance is key: a little fat, plenty of acidity, lots of fresh flavour.

With a menu built around fresh salads, grilled vegetables, delicate fish and fruit, your garden party or barbecue will feel relaxed and generous. Keep an eye on the clock, keep cold dishes cold, and let the sunshine do the rest.