Pistou is the Provencal cousin of Italian pesto (difference: the French version doesn’t include pine nuts), and it’s used as a condiment as well as in a soup that bears its name. This spring rendition of the typically summery soup adds a touch of fresh mint to the traditional basil in the pistou (just enough basil to “borrow” from your new seedlings), and substitutes leeks for onions and sugar snap peas for haricots verts in the soup itself. As spring turns to summer, adapt the recipe to use whatever produce is available. Add zucchini or other summer squash. Trade the snap peas for green beans, use fresh shell beans instead of canned, and swap canned tomatoes for peeled, seeded summer-fresh tomatoes (you’ll need 1 1/2 cups). Serve with grilled bread.