4 med. zucchini
2/3 c. Bisquick baking mix
1/2 c. shredded Swiss, Cheddar or mozzarella cheese
1/3 c. mayonnaise
1 egg
2 tbsp. chopped onion
1/4 tsp. Italian seasoning
1/4 tsp. salt
1/8 tsp. pepper

Heat oven to 450 degrees. Place zucchini in enough boiling water to cover. Return to boiling; reduce heat. Simmer uncovered 5 minutes; drain and cool. Cut each zucchini lengthwise into halves. Scoop out centers; chop and drain.

Mix chopped zucchini and the remaining ingredients. Fill zucchini. Place in rectangular baking dish, 12 x 7 1/2 x 2 inches. Bake until filling is puffy and golden brown, about 20 minutes.