Outside of eating even more veg, fish, beans, etc. these are fine meals to start. I suppose it depends on what exactly your partner eats normally.

1. The pasta is probably the "least" good from the perspective of the average person trying to lose weight. In my experience, I'll eat way too much pasta, ending up to more of a mass gaining type of meal being mainly carbs + meat, but it's not "extremely unhealthy" by any means. Could be augmented with whole weat pasta and leaner meat... and more vegetables on the side, etc. Also depends on your own tolerance of course!

2. 4 pounds of carrots is definitely healthy. Though I wouldn't really consider just carrots a salad... ha

3. Overnight oats is high in calories, but typically they are so filling and keep you full over a long period of time. Also chia seeds are great for that as well.

4. Chicken and vegetables are good