Preheat oven to 375°F (190°C) and grease a 9×13 inch baking dish.
In a large skillet over medium-high heat, brown the ground beef; drain excess grease.
Sauté the onion and garlic until translucent. Add green bell pepper and cook until softened.
Stir in diced tomatoes (with juice), corn, green beans; mix well.
Add cream of mushroom soup, Worcestershire sauce, thyme, black pepper, and salt; stir until combined.
Simmer on low for 10-15 minutes.
Mix in 1 cup of shredded cheddar cheese until melted.
Prepare the biscuit topping by whisking together flour, baking powder, and salt in one bowl; in another bowl combine milk, egg, and melted butter before mixing into dry ingredients.
Pour beef mixture into the baking dish; drop spoonfuls of biscuit batter on top.
Sprinkle remaining cheese over the biscuit topping.
Bake for 20-25 minutes until biscuits are golden brown.