I literally just made a "vegetable bolognese" last week with leftover vegetables from the fridge that were about to go bad. I have to say, it was probably one of the best tasting pasta dishes I have made, and it's even better the following day. This is my recipe (of course you can add or omit anything you like, but try to keep the ratios of liquid to solid stuff about the same, it's already quite chunky as it is).
INGREDIENTS:
130 grams dried green lentils (sometimes called Puy or French lentils)
1 brown onion, finely diced
2 carrots, finely diced
1 small sweet potato, finely diced (chop the carrots and potato to about the same size; depending on what type of pasta you're using (e.g.: shells) aim for something that fits in the pasta)
400 grams mushrooms, small to medium chop (don't chop them too fine, they'll shrink as they cook; I used half white cup/button mushrooms and half swiss brown, but use anything you have)
5 garlic cloves, finely diced or crushed (add more if you like things super garlicky)
1 tablespoon fresh rosemary, roughly chopped (or sub 0.5 tablespoon of dried)
1 tablespoon fresh sage. finely chopped (or sub 0.5 tablespoon of dried)
1 tablespoon (or to taste) of dried chilli flakes
130 grams tomato paste
30 mL (1.5 tablespoons) tamari (if you don't have tamari, use about half that amount of Maggi seasoning, or low-salt soy sauce, but go easy)
250 mL (1 cup) dry to semi-dry white wine (I used Sauvignon Blanc since that's what I normally drink; Pinot Gris or a dry Riesling would also work well)
500 mL (2 cups) chicken stock
250 mL (1 cup) milk
Parmesan cheese (to serve)
METHOD:
1. Rinse the lentils in cold water then boil for 10 minutes in a small saucepan. After 10 minutes, drain and rinse under cold water to halt carry-over cooking. Set these aside.
2. Heat a good glug of olive oil in a large pot, cast iron pan, etc... over medium heat. Gently cook the onion, carrot and sweet potato for about 5 minutes until slightly softened. (If you're adding minced meat, I'd include that at this point as well). Add a big pinch of salt and pepper. (Optional: I also added a pinch of MSG, just to bring out some of the flavours.)
3. Add about half of the mushrooms and reduce down slightly (for about 3 minutes). Add the remaining mushrooms and continue cooking for about 6 or 7 minutes. Go gentle, turn the heat down if things are starting to brown too much. We're going to be cooking this for a while.
4. Add the garlic, chopped herbs, and chilli flakes. Give that a few minutes.
5. Add the tomato paste and tamari. Stir together and cook for a few minutes to open up the flavour of the tomato paste. Add the partially cooked lentils and stir everything together.
6. Add the white wine and bring to a gentle simmer. Reduce this for about 4-5 minutes.
7. Add the chicken stock and milk, bring to a gentle simmer, then turn the heat to low and cook uncovered for about 50-60 minutes, or until most of the liquid has reduced. Don't rush, take your time. The heat should be as low as it can go to prevent things from sticking/burning. Stir every 10 minutes or so, as the lentils have a tendency to sink to the bottom of the pot.
8. After about an hour, give it a taste, adjust the seasonings as required, and you're done!
9. Serve with any type of pasta you like. Top with a generous amount of parmesan cheese.
NOTES: You could use just about any vegetables you like. Throw in some leafy greens like chopped spinach or kale, or even corn kernels (frozen or fresh) during the last 5 minutes of cooking. I omitted celery because I hate it, but if you like it, add it in at Step 2.