Heat oil in a large skillet over medium heat. Add onion, bell pepper, garlic, dried oregano and saffron then season with salt and pepper and cook, stirring, for 3-4 minutes until fragrant. Add the paprika and continue to cook. Add the rice and cook for 1-2 minutes, stirring to coat all the rice with the spices. Add the cherry tomatoes, and hot stock, stirring to combine.