In a food processor, process the stuffing mix until finely crushed; set aside. Crumble sausage into a large nonstick skillet; add the onion, celery and oil. Cook over medium heat until sausage is no longer pink and vegetables are crisp-tender; drain. Remove from the heat; stir in the next seven ingredients and crushed stuffing. Fold in 2 cups cheese.
Spoon 2 tablespoons into miniature muffin cups coated with cooking spray. Sprinkle with remaining cheese. Bake at 350° for 20-22 minutes or until a toothpick comes out clean. Cool 5 minutes; remove to wire racks.
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