Ratatouille is Provence's most famous vegetable preparation — a stew of aubergines, courgettes, peppers, tomatoes, and onions, each cooked separately to preserve its individual character, then combined and gently simmered to create a unified dish where every element retains its identity while contributing to a harmonious whole. The common method of dumping everything into a pot and simmering until mushy produces an entirely different (and inferior) dish. True ratatouille is an exercise in parallel vegetable cookery — each component sautéed or roasted to its own ideal point before the final assembly. Cut 2 medium aubergines, 3 courgettes, and 2 large peppers into uniform 2cm dice. Dice 3 ripe tomatoes (peeled and seeded) and slice 2 onions. In a wide, heavy pan, heat olive oil generously and sauté each vegetable separately: first the aubergines until golden and soft (they absorb oil voraciously — this is correct and desirable), then the peppers until soft and lightly coloured, then the courgettes until just golden on the cut faces but still slightly firm. Set each aside. Sweat the onions with 4 cloves of sliced garlic in fresh oil until translucent, add the tomatoes, and cook for 10 minutes until broken down into a loose sauce. Return all the vegetables to the pot, add a bouquet garni (thyme, bay, rosemary), season with salt and pepper, and simmer gently for 20-30 minutes, partially covered. The vegetables should meld flavourfully but remain distinct — you should be able to identify each element in every spoonful. A finishing drizzle of the finest Provençal olive oil, a chiffonade of fresh basil, and a few leaves of fresh thyme complete the dish. Ratatouille is traditionally served at room temperature, where its flavours are at their most expressive — the cooling concentrates and integrates the vegetable essences in a way that hot service cannot match. It improves significantly overnight. As a side to grilled lamb, alongside a roast chicken, or simply with bread and fresh goat cheese, ratatouille is the taste of the Provençal summer.
Each vegetable cooked separately to its own ideal point before combining. Aubergines, peppers, and courgettes sautéed individually in generous olive oil. Tomatoes cooked with onions and garlic into a loose sauce base. Final gentle simmer combines without overcooking individual elements. Served at room temperature for best flavour expression. Improves overnight.
Salt and drain the aubergine dice for 30 minutes before cooking — this draws out moisture and reduces oil absorption. Thomas Keller's 'confit byaldi' (the Ratatouille film version) arranges thin-sliced vegetables in overlapping rows over piperade — a stunning presentation. Some Provençal cooks add a tablespoon of wine vinegar at the end to brighten. Ratatouille freezes well and makes an excellent base for shakshuka-style eggs. The dish should taste distinctly of olive oil — use the best you have.
Cooking all vegetables together from the start, producing a homogeneous mush. Insufficient olive oil — Provençal cooking demands generosity with oil, especially for aubergines. Cutting vegetables in unequal sizes, causing uneven cooking. Over-simmering the combined dish until vegetables lose identity. Using out-of-season, flavourless vegetables — ratatouille is a summer dish and depends on peak ripeness.
French Regional Cooking — Anne Willan