Spinach & Gruyere Stuffed Tilapia

Preheat oven to 400 degrees F. Coat a 9-by-13-inch baking dish with cooking spray.

Heat 2 teaspoons oil in a medium nonstick skillet over medium heat. Add onion; cook, stirring, until soft, about 2 minutes. Add garlic, cook for 15 seconds, then add spinach and cook, stirring, until wilted, about 1 minute. Transfer the vegetables to a bowl and let cool for 2 minutes.

Cut lemon in half; juice one half and add the juice to the vegetables. Add breadcrumbs, cheese, almonds, egg, mayonnaise and 1/8 teaspoon each salt and pepper; stir to combine.

Sprinkle fish with the remaining 1/8 teaspoon each salt and pepper, then cut each fillet in half lengthwise. Place 1/4 cup of the spinach stuffing in the middle of each piece of fish. Roll up from the small end and place seam-side down in the prepared baking dish. Brush the stuffed fish with the remaining 1 teaspoon oil. Cut the remaining lemon half into 4 slices and place one on each roll.

Bake until the tilapia is opaque in the middle, 12 to 15 minutes.