Tuna Avocado Brown Rice Bowls

Bahan-bahan (3 porsi)

• 1 1/2 cups uncooked brown rice
• 3 ounces feta cheese, crumbled
• 2 (5-ounce) cans tuna packed in oil, drained
• 2 medium avocados, diced
• half of an English cucumber, diced
• half of a small red onion, very thinly sliced
• 1/4 cup chopped fresh dill, loosely packed
• 2 tablespoons olive oil
• 2 tablespoons lemon juice
• 1 teaspoon Dijon mustard
• 1/2 teaspoon each: fine sea salt, freshly-ground black pepper, ground cumin, ground sumac