Preheat your oven to 375°F (190°C).
In a large skillet over medium heat, add the ground beef and chopped onions. Cook for about 5-7 minutes, until browned and onions are translucent.
Stir in the jalapeño, green chilies, taco seasoning, and 1/4 cup of water. Simmer for about 3-4 minutes, then remove from heat.
In a mixing bowl, combine the biscuit mix and 1/3 cup of water. Stir until just combined to form a dough.
Spread half of the biscuit dough evenly in a greased baking dish to form a crust. Pour the beef filling over the crust, then spoon the sour cream and mayonnaise mixture on top. Sprinkle with cheese and diced tomatoes.
Drop spoonfuls of the remaining biscuit dough over the top of the filling.
Place in the oven and bake for about 25-30 minutes, until the biscuit topping is golden brown.
Let cool for about 10 minutes, then slice into squares and serve warm topped with avocado, lettuce, and paprika if desired.