Prepare Savory Gluten-Free Tart Crust. Roll dough to 1/8-inch to 1/4-inch thickness on work surface dusted with brown rice flour. Cut dough into 4 (5-inch) circles. Lightly press into 4 (4 1/2-inch) nonstick tart molds; trim off excess crust, and refrigerate dough in molds 20 minutes.
Combine goat cheese and next 5 ingredients. Divide goat cheese mixture among tart crusts. Top with tomatoes, and sprinkle evenly with salt, black pepper, and sugar.
Bake at 400° for 25 minutes or until crust is golden brown.
Serve tarts warm or at room temperature. Garnish, if desired.