Preheat the oven 375F/190C
Heat a frypan/skillet and add the garlic, cook for 1 minute until slightly browned
Next add the ground beef and break up, cook until fully cooked and browned.
Pour in the marinara sauce and add the Italian seasoning, stir until fully mixed and the meat is fully covered. Add the sea salt and black pepper, stir again and cook for a further 10 minutes.
Prepare the peppers by chopping off the top and scooping out the seeds, slice a tiny layer off the bottom so that the peppers will stand upright.
Line a baking sheet with foil and stand the peppers upright on the sheet.
Spoon 2 tbsp of meat mixture into each of the bell peppers, follow with 1 tbsp of ricotta cheese, and fill to the top with shredded mozzarella cheese.
Cover with aluminum foil, making sure the foil is not touching the cheese, bake for 30 minutes then remove the foil and return to the oven for a further 10 minutes until the cheese is melted and browned.
Serve immediately, or cool and store ready for later.