Preheat the oven to 180°C / 356°F (fan oven setting)or 200°C / 392°F (regular setting).
Add butter to a large pan. Let it melt, then add onion. Gently fry for 2 minutes.
Add grated carrots and fry for 5 more minutes.
Then add garlic, mushrooms & lentils. Stir well and fry for 15 minutes.
Add oats, vegetable stock & seasoning.
Stir well and let it cook for about 10 minutes until the mixture is thick and water has evaporated.
Optional - add seeds. Mix well.
Transfer the mixture to a lined loaf tin. Use a spatula to even out the top.
Lastly, bake for about 35 minutes.
Serve with neeps (mashed turnip) and tatties (mashed potatoes) or other veggies/sides!
Video
Notes
Ingredient Tip - I chose button mushrooms. You can use any mushrooms you want, but cremini, portobello & shiitake mushrooms work too.Tip 1 - Don’t make it too watery . Aim for the consistency of a very thick oatmeal/porridge.Tip 2 - Adjust seasoning to taste. Taste the mixture before adding it to the oven and adjust to taste (esp salt & pepper).Tip 3 - Let it cool down a little before removing it from the loaf tinTip 4 - Slice it or simply spoon it onto your plate - completely up to you.Tip 5 - There are endless ways to customize this haggis. Check out the ideas in the full post.To serve - traditionally served with neeps (mashed turnips) and tatties (mashed potatoes). Or serve with other veggies of your choice.To store - Let cool. Keep in the fridge in an airtight box for 4-5 days.To freeze - Keep up to 2 months in an airtight & freezer-safe box.