Stewed vegetable marrow with sour cream

• 1 cup bioyogurt sugarfree
• 500 g vegetable marrow
• 2 tbsp mustard
• black ground pepper

Slice washed and peeled vegetable marrow. Add a little water and stew on a strong fire under the cover for 5-6 minutes. Mix yogurt, mustard, and pepper. Pour the vegetable marrow with the obtained sauce. Serve hot.