Start by peeling and dicing 2 medium avocados that are ripe-ish—soft to the touch when you press the skin, but not too soft. You want them to hold their shape when you dice them. Place the diced avocado in a medium mixing bowl.
Add 4 oz (about 1 cup) crumbled feta, 1 cup chopped cherry tomatoes, ¼ cup of finely diced red onion, and 3 minced garlic cloves to the bowl with the avocados. Toss everything gently to combine.
Drizzle in 1 Tbsp of olive oil and 2 Tbsp of lemon juice, then sprinkle in ½ tsp of salt and ¼ tsp ground black pepper. Gently mix everything together with a spoon, being careful not to mash the avocados too much. You want the dip to stay chunky!
Once everything is well combined, place in the fridge to sit for 1 hour. This will allow the ingredients to meld together. Then serve with your favorite crackers or pita chips.