Mix the ground beef and mustard together in a large bowl and season with salt (in moderation) and pepper. Shape into small balls and flatten into patties. Cook on an oiled skillet for 4 min., turning halfway. Top with cheddar cheese and allow to melt slightly.
Slice the bottoms off the cherry tomatoes to create a flat edge and then slice into halves to create a “bun”.
Use small skewers or toothpicks to thread the round top of the tomato, burger, basil, pickle chips, and finally the flat bottom of the tomato.