Mix the tomato sauce with the tomato paste in the small bowl.
Warm up tomato mixture in the microwave for 10-15 seconds.
Semi melt white chocolate in the microwave using 30 seconds intervals.
Add warm tomato mixture into melted white chocolate in 3 parts, stirring after each addition with the help of rubber spatula.
Using hand blender, emulsify the ganache until smooth.
Add unsalted butter and pinch of salt and emulsify again.
Transfer the ganache into glass container. Cover it by gently pressing plastic wrap onto surface (to contact).
Refrigerate ganache for 6-8 hours (or overnight).
Cut sun dried tomatoes into small pieces.
Transfer ganache into pipping bag with round tip. Pipe gentle amount of the ganache on one shell of the macaron. Add a few pieces of sun dried tomatoes. Sandwich the macaron with another shell.