Lowcountry Tomato Pie

INGREDIENTS

• 1 tablespoon butter
• 1 cup chopped celery
• 1 cup chopped onion
• 1/2 cup chopped green pepper
• 1 (10 ounce) can refrigerated flaky biscuits
• 3 tomatoes, thinly sliced
• 1 cup shredded Cheddar cheese
• 1 cup low-fat mayonnaise
• 1 cup sour cream
• 1 teaspoon salt-free garlic and herb seasoning blend