In a medium sauté pan, heat olive oil.
Add garlic and onion and sauté on medium-low about 4-5 minutes or until the onions have some color,
Add rotel to the pan and allow to just come to a simmer. Remove from heat and set aside.
Place tilapia in baking dish and season with salt and pepper. Top with Italian dressing (depending on how big your pan is, it might take the whole bottle, you want the fish mostly covered).
Spread tomato/garlic/onion mixture over the top of all of the fillets.
Bake tilapia fillets at 375 degrees for 10-12 minutes or until fish flakes if picked with a fork.
Sprinkle crumbled bacon on top and serve.