Toss tomatoes, pepper(s), onion and garlic in a little olive oil and salt and pepper.
Preheat oven to 375 degrees. Roast vegetables for 20-30 minutes, until lightly caramelized. Alternatively, if you're already grilling, but the vegetables on a doubled piece of aluminum foil and grill until lightly caramelized.
Squeeze garlic out of the skin and put in a blender with the tomatoes, pepper(s), and onions. Add horseradish and parsley and blend until smooth. If it's too thick, add a little water until the desired consistency. Taste and adjust for seasoning.
To serve: In a pint glass filled with ice, add a shot of vodka, a squeeze of lime juice, and a few drops of worcestershire. Fill to the top with tomato mix and shake. Garnish with pickled beans, celery, half a cherry tomato, or anything that seems right.