Artichoke Dip

12 oz canned marinated artichoke hearts, coarsely chopped
1/2 cup mayonnaise
1/2 cup sour cream
1/2 cup freshly grated Parmesan cheese
3 Tbs chopped fresh tarragon, or 1 Tbs dried
Salt and freshly ground pepper to taste

Combine all ingredients and place in a 3-cup ovenproof baking dish or casserole. Bake in a preheated 350F oven until heated through, about 30 minutes. Serve with raw vegetables, chips, or crackers. Makes about 2 cups.