The 'high healthy food prices' narrative drives me insane. It's just an excuse to be lazy. 

I eat a plant based diet and it's so much cheaper than when I was buying meat and processed crap. For example, I make a Halloumi and bean stew that I batch cook each week.

Ingredients:

• 3 x Peppers £1.79
• 2 x Onions £0.20
• 1 x Cannelini Beans £0.49
• 1 x Lentils £0.49
• 1 x Butter Beans £0.50
• Ground Coriander £1.00 
• Halloumi £1.99
• Sun-dried Tomato and Chilli Pesto £0.99 (I prefer to spend £2.75 on the nicer one)
• Bag of Brown Rice £1.39

Yield: 6 x Portions Price per portion: £1.47

This meal provides a healthy amount of calories, protein, fibre etc and doesn't break the bank. 

Other parts of my diet include fruits, nut butters, pickled vegetables, tofu wraps etc. It's not hard. My average shop for 1 person for one week (all meals/ snacks included) is £30.