In medium saucepan bring water to a boil, add in olive oil and pasta. Boil for 8 minutes or until tender. Drain and rinse pasta with cold hot water through a colander. Let rest while preparing cheese sauce.
In large skillet add in all three meats and cook until bacon is slightly crisp. Set aside.
In a medium saucepan melt butter over medium heat. Once melted add in Rice Flour and mix with a wire whisk. Once blended, add in half and half while stirring with wire whisk. Allow sauce to thicken while stirring occasionally. Slowly blend in 2/3 of the cheddar cheese, garlic and salt.
Blend pasta into sauce, folding carefully to avoid breaking the pasta apart. Blend in Meats in the same manner.
Place in ceramic or glass baking dish. Top with remaining cheddar cheese and garnish with green onion.
Place in preheated oven and bake for 20 minutes or until cheese is melted and slightly browned on top. Remove from oven and let rest for 5 minutes then serve.