It sounds like you're in a challenging situation with your boyfriend's mom, and it's completely understandable that her repeated questioning about your food choices is starting to wear on you. Here are some strategies you might consider to handle this situation gracefully while maintaining your independence and self-respect.

1. Acknowledge Her Passion

Start by recognizing her love for cooking and her commitment to healthy eating. This can help create a more positive atmosphere. You might say:

"I really admire how you cook everything from scratch. It shows your dedication to healthy eating!"

2. Share Your Own Journey

Consider sharing a bit about your own life and the reasons behind your food choices. This can help her understand your perspective better. You could say:

"I wish I had more time to cook from scratch like you do! With my busy schedule of working two jobs and teaching, I often rely on premade meals, but I always choose healthy options."

3. Suggest a Cooking Session

If you're comfortable, you might suggest cooking together when you visit. This can be a fun way to bond and show that you value her cooking skills. You could propose:

"How about we cook something together next time? I would love to learn some of your recipes!"

4. Set Boundaries

If her questions continue to bother you, it might be necessary to set some gentle boundaries. You could say:

"I appreciate your concern, but I hope you can understand that I have to make choices that fit my lifestyle. I always try to choose healthy options, even if they aren't made from scratch."

5. Redirect the Conversation

If she asks about your food again, consider redirecting the conversation to other topics that interest both of you. For example:

"Oh, this is from XYZ shop! Speaking of food, I heard you tried that new recipe you mentioned last time. How did it turn out?"

6. Discuss with Your Boyfriend

Share your feelings with your boyfriend. He may be able to help mediate the situation or provide support when visiting his family. You might express:

"I've noticed your mom often asks about my food choices, and it's starting to feel a bit uncomfortable. Can you help me navigate this?"

7. Take Care of Yourself

Ultimately, prioritize your well-being. If visiting becomes too stressful, it’s okay to limit your time with his family or take breaks. Make sure you are comfortable and respected in your relationship.

In conclusion, while it's important to respect your boyfriend's mom's passion for cooking, it's equally essential to assert your own choices and lifestyle. Open communication, empathy, and setting boundaries can help create a more harmonious relationship with her.