Indian yellow lentils with zucchini

Ingredients

• 1 cup small yellow lenses.
• 1/2 tsp. turmeric.
• 1 1/4 cups of water.
• 1 1/2 cups of diced zucchini.
• 4 tbsp. vegetable oil.
• 1 large onion, cut into thin strips.
• 2 cloves garlic crushed.
• 2 fresh green chilies, chopped.
• 1/2 tsp. mustard seeds.
• 1/2 tsp. cumin seeds.
• some cilantro leaves and chopped fresh mint.
• 6-8 curry leaves.
• salt.
• 1/2 tsp. sugar.
• 4 tbsp. lemon juice.
• 8 oz canned chopped tomatoes.