Start by preheating your oven to 170° C (338° F) Fan.
Next, rinse the tomatoes and bell peppers under cold water.
Using a sharp knife, carefully slice off the tops of each vegetable.
Using a spoon, scoop out the flesh from the tomatoes. Set it aside in a bowl.
Add the scooped tomato flesh to a food processor and purée it until smooth.
Remove the pith and seeds from the green peppers.
To help the green peppers stand upright, slice a tiny bit off the bottom.
Arrange the vegetables in a large roasting pan or ovenproof dish.
In a large mixing bowl, combine the puréed tomato flesh, onion, garlic, rice, mint, basil, parsley, tomato juice, and 50 ml of olive oil.
Carefully fill each tomato and green pepper with the mixture.
Once filled, season the tops with salt and pepper.
Replace the tops of the tomatoes and green peppers, then cover the pan with aluminum foil.
Remove the foil for the last 15 minutes of cooking.
Once baked, let cool for about 10 minutes before serving.