Lemon Butter Sauce

A fresh, lemony French sauce vierge made uncooked with olive oil, tomatoes, garlic, and basil, to be served warm or at room temperature over fish, vegetables, or grilled poultry.

Ingredients

  • 300 g ripe seasonal tomatoes
  • 90 ml mild extra-virgin olive oil
  • 45 ml fresh lemon juice
  • 1 clove fresh garlic
  • 0.5 bunches fresh basil
  • 1 piece traditional shallot
  • 1 tsp coriander seeds
  • 2 pinches fine salt
  • 1 pinch whole black peppercorns

Method

  1. Peel the tomatoes if you want a very clean sauce: lightly score the skin, plunge them into simmering water until the skin begins to lift, then immediately refresh them in cold water. The skin should come away without resistance.
  2. Cut the tomatoes into quarters, remove the excess seeds and watery pulp, then dice the flesh into even pieces. The dice should remain whole and juicy, not crushed.
  3. Peel the garlic and shallot. Mince the garlic very finely, then finely dice the shallot. The mince should be fine enough to flavor the sauce without dominating the palate.
  4. Coarsely crush the coriander seeds in a mortar or beneath the flat side of a knife. They should be cracked, not ground to powder, so they contribute small citrusy and floral notes.
  5. Combine the diced tomatoes, garlic, shallot, coriander, salt, and pepper in a bowl. Stir gently with a spoon so the tomato does not turn into a purée.
  6. Add the lemon juice, then drizzle in the olive oil while stirring gently. The sauce should become glossy, supple, and lightly bound by the tomato juices, without trying to create a thick emulsion.
  7. Let the sauce rest at room temperature until the aromas meld and the tomato releases a clear, fragrant juice. It is ready when it smells of fruity oil, fresh lemon, mellow garlic, and basil all at once.
  8. Just before serving, finely chop the basil and fold it in gently. Do not add it too early: it should retain its green color and fresh aroma and avoid turning black in the acidity.
  9. Serve at room temperature, or barely warm it over a gentle double boiler. If warmed, it must never simmer: the oil should only become more fluid and the aromas more open, without cooking the tomato or basil.

Nutrition

Per serving

Energy
221.9 kcal
Protein
0.93 g
Carbohydrate
4.69 g
Fat
22.67 g
Fibre
1.51 g
Calcium
13.8 mg
Iron
0.32 mg
Magnesium
6.34 mg
Indicative, non-medical nutrition estimate; values depend on brands, actual weights, and whether ingredients are raw or cooked.