Here is an article with tips about how to safely add high-calorie meals and snacks to your diet in a healthy way: https://patient.uwhealth.org/healthfacts/416.
For cooking ideas from Grokker's video library, you might wish to start by perusing this "Healthy Nutrition" collection: https://grokker.com/cooking/collection/healthy-nutrition/603ad327b356ab7d31b48ff0
To branch out from there, maybe you might wish to check out my (tlc tlc in Grokker's search bar) profile and click on my "collections". You'll find more than 30 food-related collections sorted by category. Those collections cover ALL of Grokker's nutrition videos, and make it easier to find what you might be searching for quickly. Best wishes and good luck!