My best advice is to find a brand of vanilla whey protein that you like. Preferably something thats advertised for "lean mass" (check the fats and carbs... buy a small container for trial purposes)

You want your morning pick me up? Add a few espresso shots mix it on skim milk and its now a vanilla latte that can sub in for breakfast.

Got some strawberries handy? Its now a strawberry shake.

Post workout protein bomb? (Yes I know you're over peanuts but Im not) 2 scoops of protein, 1 scoop of peanut butter powder, 1 banana, 1 egg and about a shot glass of maple syrup and mix on whole milk... its a reasonably large calorie hit but its also 50% of my daily protein in one go.

Chilli Chocolate? Obviously this one is "to taste" but add fresh chillis and either Cocoa powder or chocolate syrup (depending on how good you want to be)

Id also say that most people in general who try to "eat healthy" by intuition are also terrible at it. I wholeheartedly believe everyone should try a month of weighing their food and tracking their macros. If you start making regular better choices and tracking not just daily but weekly, you would be surprised at what you can fit into a "healthy" diet.