olive oil • medium onion, chopped • diced celery (4 stalks) • garlic, minced • broccoli florets • short-grain rice or 1 small potato, peeled and cubed • vegetable stock or water • bouquet garnie made with a bay leaf, a Parmesan rind, and a couple of sprigs each parsley and thyme • Salt and ground pepper, to taste • baby spinach leaves • chopped parsley, tarragon or chives, for garnish • Lemon juice, to taste •