Rice Cooker Melange

Ingredients

• 1 (14.5 ounce) can diced tomatoes, drained and juice reserved
• 1 (5 ounce) can chunk white chicken, or to taste, drained with liquid reserved
• 1 cup water, or as needed
• 1 (14.5 ounce) can fat-free chicken broth
• 1 cup uncooked brown rice
• 1/2 cup dry lentils
• 4 ounces frozen chopped spinach
• 1 (4 ounce) can sliced mushrooms, drained
• 1 1/2 teaspoons dried basil
• 1 1/2 teaspoons dehydrated onion flakes
• 1/2 teaspoon soy sauce
• 1/4 teaspoon garlic powder
• salt and ground black pepper to taste