Garlicky Vegetarian Stew

Name: Garlicky Vegetarian Stew
Ingredients: 2 tablespoons olive oil; 15 cloves garlic, chopped; 1/2 teaspoon mustard seeds; 1/2 teaspoon cumin seeds; Dash black or Aleppo pepper; 1/8 teaspoon paprika; 1/2 teaspoon curry powder; 1/4 teaspoon cinnamon; 1 teaspoon salt; 1 entire head of celery, chopped coarsely; 6 carrots, peeled and chopped coarsely; 3 sweet potatoes, peeled and cut in chunks (I like them nice and large); 1/2 cup barley; 2 cans chickpeas, or 1/2 bag dried chickpeas soaked overnight