Preheat oven to 450°F and line a baking sheet with parchment paper
Rinse the cherry tomatoes, pick the leaves off the rosemary and slice the shallot in ¼ inch pieces
Toss the tomatoes, shallot and rosemary with olive oil
Spread the tomatoes and shallots evenly on the baking sheet and sprinkle generously with salt and freshly ground pepper
Roast for 20 to 25 minutes, tossing once about half way, the tomatoes should start to burst and be slightly browned
Notes
Substitute thyme, oregano or other savory herb based on what you have and like. Add a few cloves of smashed garlic for additional depth of flavor if you'd like.