In a small skillet cook sausage until thoroughly cooked. Drain well on paper towels.
In a large bowl combine cheeses, sour cream, and chili peppers; stir in cooked sausage. Spread in a 9-inch pie plate, 9-inch quiche dish, or 1-quart au gratin dish.
Bake in a 375 degree F oven for 20 to 25 minutes or until cheese is melted and bubbly, stirring once. If desired, top with chopped sweet pepper, chopped tomato, and/or sliced ripe olives. Serve immediately with tortilla chips. Makes 8 appetizer servings.