Heat grill to medium high. Brush grill mat with olive oil and place quartered roma tomatoes on grill. Close lid and grill about 12 minutes, turning occasionally. When cool enough to handle remove skins.
Put water and garlic in saucepan or microwave dish large enough to hold all ingredients. Bring to a boil and cook about 5 minutes until liquid is reduced to about 2 Tbsps. Watch it doesn't go dry. Add tomatoes, and spices and cook/heat another 2 minutes. Stir in beans and cook 2 minutes more.
Transfer mixture to blender and blend until smooth. Serve warm or at room temperature.