A delightful and easy-to-make dish combining tuna, cheese, and a fluffy Bisquick base.
Preheat your oven to 400°F (200°C).
Ensure your oven is fully preheated for even cooking.
Grease a baking dish with butter or cooking spray.
Use a non-stick spray for easier cleanup.
In a skillet, sauté the chopped onion in butter over medium heat until golden brown.
Stir frequently to prevent burning.
Spread the drained tuna, 1 cup of shredded cheese, and sautéed onions evenly in the baking dish.
Distribute the ingredients evenly for consistent flavor.
In a mixing bowl, whisk together the eggs, milk, Bisquick mix, salt, and pepper until smooth.
Whisk thoroughly to avoid lumps.
Pour the batter over the layered ingredients in the baking dish.
Pour slowly to ensure even coverage.
Bake in the preheated oven for 25 minutes.
Check for doneness by inserting a knife into the center.
Sprinkle the remaining cheese on top, leaving a 1-inch border, and bake for an additional 5-8 minutes until melted and bubbly.
Allow the cheese to slightly brown for extra flavor.
Let the bake cool for a few minutes before serving.
Cooling helps the bake set and makes serving easier.
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