Lentil and pea stew

Ingredients

• 1 cup dried green lentils
• 1 white onion, finely diced
• 1 stick celery, finely diced
• 1 carrot, finely diced
• 4 cloves garlic, minced
• 2 tsp vegetable oil
• 1L chicken stock, made from stock cubes
• 2 tsp dried Italian herbs
• sea salt flakes and freshly-milled black pepper
• 2 cups frozen peas
• steamed rice, to serve