Mixed Greens and Potatoes Kebab

Meat - Cow - -

• 4 T margarine
• 675 g / 1 1/2 lb soy beef substitute (I use dry soy chunks, reconstituted)
• 3 onions chopped
• 1 clove garlic, minced
• 675 g / 1 1/2 lb fresh mixed greens, chard, escarole or spinach
• 2 medium potatoes, peeled and cut into 2.5 cm / 1 inch cubes
• 1 t sugar
• 1 cup veggie stock (dark mushroom stock works well)
• Salt and pepper