Healthy meal ideas on a budget

I need some help and creativity when it comes to food. Due to covid my husband lost his job, and we get just enough money from EI and Child Tax to pay our bills, with only $200 a month left for food. I find myself buying all the unhealthy cheap things because now it is just about filling my little ones belly, rather than proper nutrition. I feel ashamed and guilty. The cost of food here is super high, and it’s hard to make ends meet. Any ideas would be lovely.