Place sun-dried tomatoes in a small bowl and cover with half cup boiling water. Set aside. In saute pan, heat some broth and saute onions on med heat, covered, 3 minutes. Drain sun-dried tomatoes, reserving their liquid, and add to onions. Stir in garlic, capers, thyme and tarragon. Add chopped tomatoes, peas and reserved tomato-soaking liquid. Saute covered until tomatoes soften and lose shape. Add salt and pepper to taste. Toss hot cooked pasta with sauce, stir in parsley, and top with parmesan.