Preheat the oven to 350 degrees Fahrenheit.

Combine flour and a splash of milk and stir until a smooth paste is formed.

Add the remaining milk, 1 cup shredded sharp cheddar, and a pinch of salt and pepper to the flour mixture and stir thoroughly.

Microwave the cheese mix until thickened, stopping the microwave every 2 minutes and stirring thoroughly each time.

Brown the steaks for 1 minute on each side then add to a shallow baking tray.

Add the jalapeño slices on top of the steaks and then pour over the sauce

Top with the remaining half cup shredded cheese and sliced scallions.

Bake in the preheated oven for 15 minutes.

Serve immediately.