Warm vegetable stock in a saucepan. Add saffron too. Take it off the flame just before the stock comes to a boil.
Mix rice, smoked paprika, turmeric, oregano, salt, and pepper in a small mixing bowl. Set it aside.
In a pan, add olive oil. Fry garlic and onions. Cook for 1-2 minutes or till the onions turn translucent.
Then add mushrooms and cook for another 3-4 minutes or till the veggies are done.
Add bell pepper, and the chickpeas, rinsed and drained. Cook for 2-3 more minutes.
Add the Tuttorosso Petite Diced Tomatoes along with the juice from the can and cook until most of the liquid has evaporated and the mixture thickens slightly (around 5-6 minutes).
To the center of the pan add the rice mixture. Stir the rice to coat, for about 1 minute.
Pour the warm vegetable stock over the rice. Make sure all of the rice is submerged. Use the back of a spoon if necessary to push it down into the liquid. Bring to a simmer without stirring. Lower the flame to medium.
Close the lid and cook until the rice is almost cooked 15-18 minutes. If you feel the liquid is boiling away too quickly you may add about a ½ cup of the warm stock as needed.
Remove the lid and continue cooking, checking the bottom of the rice with a metal spoon or spatula until the rice forms a golden crust (socarrat). This will take anywhere from 10-15 minutes depending upon the heat.
Do not move too much of the rice, just a small amount to check. You may hear the crackling or sizzling of the rice, that is what you want. Just make sure it doesn't burn.
Remove the pan from the flame and let the paella rest covered for 10 minutes.
Garnish with chopped parsley and serve with lemon juice/wedges/slices.