Salsa without broth

4 tablespoons butter 1 yellow onion , finely chopped 4 tablespoons all-purpose flour 2 cups heavy cream 1 teaspoon salt 1/2 teaspoon pepper 1 (28 ounce) can[...]

4 ounces cream cheese , softened (reduced fat) 4 tablespoons salsa (homemade or prepared) 4 flour tortillas (10-inch) 8 ounces baked chicken breasts 4 slices[...]