Combine mustard and garlic in large bowl. Add turkey and turn to coat. Let stand approximately 45 minutes or less
Combine next 6 ingredients in medium bowl. Season to taste with salt and pepper.;(Can be prepared up to 2 hours ahead. Cover.)
Preheat oven to 450°F. Line baking sheet with foil. Transfer turkey to prepared baking sheet. Pat on all remaining mustard mixture. Bake until cooked through, about 20 minutes. Let stand 5 minutes. Cut into thin slices. Transfer to plates and top with tomato compote.