Quick Marinara with Toasted Garlic and Rosemary

Strain off and discard 1/2 cup of the tomatoes’ juices (this will give the sauce a thicker consistency).Heat the oil and garlic in a 4-quart saucepan over medium heat until the garlic sizzles steadily and turns golden brown in places, about 3 minutes. Add the rosemary and red pepper flakes; reduce the heat to medium low, and cook, stirring, for 30 seconds. Add the tomatoes and their remaining juices, 1 tsp. salt, and 1/2 tsp. pepper, and bring to a boil. Reduce to a gentle simmer, cover with the lid ajar, and cook for 15 minutes, stirring occasionally, so the flavors meld and the sauce reduces slightly. Using an immersion blender or working in batches in a regular blender, purée the sauce. Taste the sauce and season with more salt, pepper, or red pepper flakes if needed. If too acidic, add the sugar. Serve immediately or let cool to room temperature and refrigerate for up to one week, or freeze in zip-top bags or airtight containers.