Line 2 baking sheets with foil or parchment paper (clean-up will be easier, you’re welcome).
Slice bread into about 24 slices, set aside.
Cube chicken. Slice mushroom (if mushrooms are large, cut slices in half). Slice bacon into small pieces. Cube tomatoes.
Cook chicken and 2 tsp oil on high heat until cooked (about 5-7 min), lightly salt and pepper. Remove chicken.
In the same skillet, sauté mushrooms with 1 tsp oil until golden, lightly salt and pepper. Add garlic and chicken to mushrooms, mix.
Pour heavy whipping cream into a skillet, mix well and add Parmesan cheese. Turn heat down to low/medium. Stirring frequently, cook 3 minutes. Set aside to cool.
Lay out the bread slices on baking sheets. Add a generous portion of the Chicken Alfredo mixture from the skillet. Add tomatoes, then cheese and bacon.
Bake in preheated oven to 365°F, 12-14 minutes.