If topping savory oats with roasted vegetables, turn on oven and prep veggies for roasting. See above "Serving Suggestions" for veggie roasting ideas and details.
Prep initial ingredients: chop leeks (or onions). Begin on savory oats. Melt plant-based butter on medium heat in large saute pan or sauce pan over medium heat.
Add leeks (or onions). Cook for 3-4 minutes, until leeks/onions soften.
While leeks are cooking, chop mushrooms and garlic.
Add mushrooms and herbs. Cook for 3 more minutes.
Add garlic. Cook for 1 minute.
Add white wine if using. Stir for 1-2 minutes, until liquid is mostly absorbed, using cooking spoon to scrape off bottom of pan.
Add in steel cut oats. Spread them around the pan and cook for 1-2 minute, stirring frequently to avoid burning. This will lightly toast the oats before more liquid is added in.
Add 2 cups of broth. Stir occasionally. As the liquid cooks down, add 1 more cup of broth at a time, every 6-7 minutes for the next 3 cups of broth.
If you haven't already, de-stem kale and chop. When adding the last cup of broth, also add in kale and nutritional yeast (starting with 1 tablespoon). Pat down kale so that it is covered by liquid.
Cook for another 3-4 minutes on low.
Squeeze in lemon and mix. Taste. Add salt and/or more nutritional yeast as desired.
Plate. Top with roasted vegetables, fresh herbs, and/or cheese (optional).