Grape Muffins

• 12 oiled muffin tins
• 3 natural sweetener
• 1 egg
• 5/8 full
• 300 ml grape juice
• 130 gr am wheat pastry flour (whole)
• 120 gr am blue cornmeal
• 65 gr nuts (chopped)
• 60 ml yogurt (plain)
• 16 ml am unrefined vegetable oil