I make this in the Insta pot for ease, but you can make with a skillet or any pressure/slow cooker. Any time you see Insta Pot, you can use other methods in replace of, such as: skillet, large pot, other branded pressure cooker or slow cooker. You can also use the slow cook option on the Insta Pot instead of the Pressure Cooker. I do pressure cook for time saving. The times of various methods will be slightly different: About 3-10 minutes for pressure cooking About 30 minutes for slow cooker About 45 minutes for stove top I like to prepare as much as possible before cooking, so these instructions reflect that: Ingredient Preparation: 1. Dice Onion, Red and Green Peppers, and Garlic into as small of chunks as you prefer. (If you are using fresh mushrooms and/or tomatoes, dice them as well. Do not put tomatoes in the bowl, keep them separate.) 2. Put them in a small bowl and give them a little stir. 3. Combine spices in small cup (Oregano, Basil, Thyme, Red Pepper Flakes, Italian seasoning, Garlic Salt, Onion Powder, Parsley Flakes, Rosemary, Salt and Peppper) and give you a good little stir. 4. Add the post-saute liquids in a small bowl or cup (Chicken Broth, Olive Oil, Red Wine Vinegar, Red Wine, and Lemon Juice) and give it a little stir. Saute: 1. Turn Insta Pot on Low Saute 2. Add 2 tbsp Olive Oil 3. Add diced vegetable mixture and saute for about 1-2 minutes. Not browning them, but enough to give them a little jumpstart Cooking Sauce: To avoid a *burn* error, be sure NOT to mix the ingredients together in the pot. Little light liquids on the bottom, the heavier puree on the top. You can mix once completed. 1. Add the remaining liquids to the Insta Pot (Chicken Broth, Olive Oil, Red Wine Vinegar, Red Wine, and Lemon Juice) to deglaze the bottom of the Insta Pot. ***If pressure cooking, be sure there are no browny bits or the Insta may give you a *burn* error during pressure cooking 2. Add the Diced Tomatoes (with the water/juice from can) 3. Add the Mushrooms (drained) 4. Add the Spice Mixture (Oregano, Basil, Thyme, Red Pepper Flakes, Italian seasoning, Garlic Salt, Onion Powder, Parsley Flakes, Rosemary, Salt and Pepper) 4. Add Tomato Puree 5. Turn vent to Sealing 6. Set Insta to Low Pressure for 3 minutes. (If slow cooking, set slow cooker to low for about 30 minutes) 7. Release Steam Valve 8. Once steam is all released, remove top and let cool before putting away