A plain dinner still counts
Rice and peas, toast and banana, potato and yogurt if milk is fine. Plain food is not a failure.

Plain is the point
The goal is a meal they can recognise. Fancy is optional. Calm is the point.
A photo of a restaurant plate is not the standard for a Tuesday. A bowl they have seen before is a success.
A plain plate you can repeat
Rice with peas. Potato with a soft vegetable. Toast with banana. Oats with fruit, when wheat is fine.
If milk is an allergy, leave yogurt and cheese out of the plain plate. Fruit, rice, potato, or beans can take that spot.
When you want more variety
Variety can be the same foods in a different pot, not a new cuisine every night. The app is where a week of one new food gets written down.
Tonight, plain and eaten is better than interesting and refused.
A sentence you can say
“This is the rice you know.”