Dijon Portobello Steaks with homemade chips and roasted red pepper sauce

I recently purchased the book ‘The Complete Guide to Vegan Substitutions’. I highly recommend this book for vegans new and old. I love it. I thought it was set out nicely and was clear and concise (but more on this in a later post!).

So I was inspired by this book to try out the ’Dijon Portobello Steaks’. The book recommends serving this dish with Yucca fries and an Aji verde sauce (which is a sauce commonly found on tables in Peru and the rest of South America). However, I didn’t have/ couldn’t find some of the ingredients for these side dishes so I decided to just substitute them for things I did have. Instead of the yucca fries I went with making homemade chips my mum’s way and the  I guess the sauce I ended up creating was a simple roasted red pepper concoction as opposed to being what you’d find in Peru. It turned out quite nicely in the end even if I do say so myself and I shall definitely be sampling these again!

So without further a do here’s how my first culinary adventure began…

You will need:

For the ’steaks’

½ cup (120ml) mild Dijon mustard

3 tablespoons (45ml) balsamic vinegar

2 tablespoons (30ml) agave nectar (This is a natural sweetener that I literally couldn’t live without. If you’re in the UK you’ll be able to pick this up at Holland and Barrat quite easily, I have come across it Tesco too so keep an eye out for it!)

2 Large Portobello mushrooms, stems removed

For the sauce

– a handful or so of fresh baby spinach

– a handful of fresh parsley

3 sweet pointed peppers

2- 3 cloves of garlic (depends on size and how much you like garlic!)

1 tablespoon of fresh lime/ lemon juice (I used lime juice for mine because that’s what I had but lemon would work just as well!)

For the chips

3-4 red russet potatoes (again this really depends on size and how many you’re cooking for)

.::How it’s done:


  • Remove the stems from the peppers and place on a lined baking tray, spray with a little cooking oil and roast at 180°C (350°F, or gas mark 4) for about 30minutes.

  • When peppers are ready, chop them up and place in a blender with the rest of the ingredients. Blitz until puréed.


  • In a small bowl mix together the mustard, balsamic vinegar, and agave . Season to taste. Place the mushrooms in a small bowl and cover with the marinade. Let this soak for at least 15 minutes.

  • Remove mushrooms from marinade and place on the grill or in a grill pan, cooking for approximately 7 minutes per side basting with the marinade until mushrooms are tender.


  • Peel, wash, and chop potatoes into chip shapes.
  • Boil chips for approximately 5 minutes. You don’t want the potatoes too soft!
  • Drain chips on a piece of kitchen roll and leave to cool for a couple of minutes.
  • Place chips on a baking tray, spray with some cooking oil and pop in a pre-heated oven at 180°C (350°F, or gas mark 4) for around 20-25 minutes.


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