INGREDIENTS 8 tablespoons (1 stick) unsalted butter 1 tablespoon plus 1 teaspoon all-purpose flour 2 green bell peppers, cut lengthwise into 1/4-inch-thick slices 1 large onion, halved lengthwise and cut into 1/4-inch-thick slices 2 celery stalks, cut into 1/2-inch-thick pieces 6 canned whole plum tomatoes (from one 28-ounce can), crushed 1 can (14 1/2 ounces) […]
