Bring water to a boil in a large saucepan; add peppers, and cook 4 minutes, turning frequently. Drain peppers; set aside.
Preheat oven to 350°.
Remove casings from sausage. Cook sausage in a large nonstick skillet over medium-high heat until browned; remove and set aside.
Add oil to pan; place over medium-high heat. Add onion, garlic, and celery, and sauté 3 minutes or until tender. Stir in rice and next 4 ingredients.
Spoon mixture evenly into peppers; place peppers in an 8 x 4-inch loaf pan. Bake at 350° for 25 minutes.