Dairy fat is a good addition to things. Labne kefir cheese is a lot like cream cheese except not as high in fat. There's always cream cheese for more fat. Real sour cream (Wallaby brand is just cream and culture) and real creme fraiche (also should be just cream and culture) have a consistency and taste similar to yogurt but more fat. You could just put a blob of any of these things on top of whatever you are having, whether it's avocados, vegetables, potatoes, meat, salad or fruit.
You could also experiment with fancy oils, such as walnut oil or pistachio oil. Pour that over veggies or potatoes or even over cheese.
Another thing I've made besides pesto is olive tapenade.
Female, 5'3", 49, Starting weight: 163lbs. Current weight: 135 (more or less).
Starting squat: 45lbs. Current squat: 170 x 3. Current Deadlift: 220 x 3