Start by preheating your oven to 400F. Grease a 9"x13" baking dish with non-stick spray or butter.
Place the ground beef, chopped bell, and chopped onion in a large frying pan. Cook until the ground beef is fully cooked.
Transfer the ground beef mixture to a large bowl. Add the can of cheese soup to the bowl.
Add the chopped jalapenos and the taco seasoning to the bowl and mix everything together.
Fold in the frozen hashbrowns and half of the grated cheese into the meat mixture. Stir gently so that the hashbrowns do not break apart too much.
Transfer the taco hashbrown mixture to the prepared baking dish. Level out the mixture in the dish and then sprinkle the remaining grated cheese on top. Place in the preheated oven, uncovered, for 30 minutes.
Remove from the oven and let it rest for 5 minutes before serving. Top with your favorite toppings, like sour cream and salsa.