Protein pizza

Ingredients

• 150 g quark
• 2 eggs
• 2 tsp baking powder
• 200 ml water
• 300 g whole-wheat flour
• 1/2 tsp salt
• 150 g ham
• 200 g tomato sauce
• 1 onion
• 1 red bell pepper
• 1/3 package canned sweet corn
• 80 g cheese