Pico de Gallo Salsa

• 4 medium tomatoes, diced
• ½ cup diced red or purple onion
• ½ cup chopped green onions (scallions)
• ½ cup chopped fresh cilantro
• 2 tbsp minced jalapeño pepper
• 2 tbsp fresh lemon juice
• 1 tbsp chili powder ¼ tsp salt