Pre-heat oven to 425 degrees.
Place the peppers cut-side down on a baking sheet with a lip or a baking pan.
Bake for 10 minutes.
Turn peppers over and bake for an additional 5 minutes.
Repeat previous step two more times.
Total baking time is 25 minutes.
Remove tray from oven and cover with a clean dishtowel for 10 minutes.
The peppers should be soft and tender and you can easily slip off the skins.
Cut the green peppers into a 1/4-inch dice.
Slice the red pepper halves in half (now they will be quarters) and reserve.
Add 1 tbsp of oil to a non-stick skillet over medium heat.
Add onions and stir for a minute, then add garlic and stir for 30 seconds.
Add the green peppers, lower the heat a bit and cook for 5 minutes.
Add tomatoes, cumin and cayenne and mix well.
Cook an additional 6 minutes looking for the mixture to loose some of its moisture.
Combine the ingredients for the dressing in a small bowl and whisk.
To assemble your salad, arrange the red pepper quarters on a serving platter -- a la spokes on a wheel or flower petals; it's fine if they overlap a bit.
Drizzle dressing over the red peppers.
Spoon the green pepper-tomato mixture into the center -- allowing some to casually spill over.
Alternately, you can arrange this on single serving platters with 2 red pepper quarters in a V-shape and the green pepper-tomato mixture placed where the two strips join together.
This salad can be served chilled or at room temperature.
Ready in 45 min.