One Pan Vegetable Quinoa Paella

Name: One Pan Vegetable Quinoa Paella
Ingredients: 1 tablespoon olive oil; 1 medium white onion chopped; 2 - 3 garlic cloves minced; 1 cup chopped baby bella mushrooms about 6 - 8 mushrooms; 1 15oz can chickpeas, drained & rinsed; 1 14.5oz can diced tomatoes (I used fire roasted); 1 14.5oz can artichoke hearts, in water; 1 cup white quinoa; 1 teaspoon smoked paprika; 1/2 teaspoon saffron threads; Salt & pepper to taste; 2 cups vegetable broth; 1 cup frozen green beans; 1 bell pepper sliced; Juice of 1/2 a lemon optional