Aunt Eloise's Borscht

• 4 potatoes-cubed
• 3 sour leaves
• 2 beets
• 1 onion (shredded)
• 1 tin tomatoes
• 1/2 cabbage (finely shredded)
• 1/2 lemon see note
• 55 gr margarine
• 2 gr parsley (fresh minced)
• 1 gr oregano rubbed to powder (dried)