I discovered these silicone portion cubes for the freezer from some friends on a Discord for people with Chronic illnesses and issues. I gotta say, I'm loving this. I've yet to try the other things like veggies, gravies, even pasta that they showed me, but my first two forays are awesome. (more info and links in comments)
I got the two-pack of gumbo and a two-pack of the GOOD marinara at Costco, far more cost effective than Rao's at the regular grocery store. Two of these little cubes are a portion, and one of the gumbo. Not only am I not wasting leftovers in the fridge before I'm in the mood to have it again, I'm only defrosting what I need and not an entire package.
Yeah, I only have room currently to freeze 1 of the big trays OR two of the little ones at a time, but it's ready to put in labeled freezer bags the next day. As I clear out the freezer, that'll get better. The frozen things pop out super easy and I can also see exactly how many meals I'm getting for my money.
Example: 2 of those cubes of sauce are a portion the way I like it. The two jars filled two trays and has enough left over for my lunch or dinner, so that's really 7 portions, or 7 meals. (or me, then 3 meals for me and the person I live with. Still not bad at all.) Links to where I bought them at the end, I'm not an affiliate so I don't get anything for recommending things. Also not why I do it.)
The smaller cubes: amazon.com/dp/B0CXSSY6C2
The larger ones: amazon.com/dp/B0F2F1RCBH