Struggling to get calories in

Hi all. I’m 18 and trying to gain weight but am struggling to eat enough calories.

July last year, I fell ill and lost quite a bit of weight and since then, my diet has gone down hill. I’m not extremely skinning and my BMI is in the healthy category.

I workout In the gym twice a day 5 days per week. No, I’m not a bodybuilder I’m just a lad with too much time on his hands 🤣

How do I consume more calories? I don’t have much money to buy food as I’ve recently been laid off so I have to rely on the food my mum buys.

I have 3 eggs, 2 pieces of toast and a tin of beans in the morning, I often miss out on dinner because I don’t know what to make or I eat a bunch of crap and I say whatever my mum makes for tea.

Any ideas how I can increase my calorie intake/eat better.

Thank you