Cut the part of the top of the tomato out that has the stem. I have no idea what it's called. But, you need to cut out the top enough to get the center scooped out and make yourself a "bowl" of sorts out of the tomato.
Mix together the cream cheese, greens, and salt & pepper until you are happy with the flavor and look. It's completely up to you how much of each you use.
Use a spoon and your clean fingers to shove the cream cheese mixture into the tomatoes.
4. Top with a bit of your greens for prettiness sake.