Check out a few helpful resources:

Successful implementation of another Faith-Based Health Promotion Program: 
https://www.doi.org/10.1007/s10900-019-00667-0

The DASH (Dietary Approaches to Stop Hypertension) Diet - research has shown that the DASH diet can help to lower blood pressure and cholesterol. DASH ranked first in the "Best Diets for Diabetes," "Best Heart-Healthy Diets," and the "Best Diets for Bone and Joint Health" categories in the U.S. News & World Report's 2023 "Best Diets" rankings (NIH, 2023).https://www.nhlbi.nih.gov/sites/default/files/publications/WES10-DASH-OverviewGuide.pdfhttps://www.nhlbi.nih.gov/education/dash-eating-plan

The Mediterranean Diet - research has shown that the Mediterranean Diet is associated with improved health and lower incidence of chronic diseases (including type 2 diabetes).  
https://oldwayspt.org/traditional-diets/mediterranean-diet


REFERENCES:
National Institutes of Health (NIH). (2023, January 3). NIH-supported DASH and TLC diets earn top spots in "Best Diets" report. News Releases. https://www.nih.gov/news-events/news-releases/nih-supported-dash-tlc-diets-earn-top-spots-best-diets-report
Romagnolo, D, & Selmin, I. (2017). Mediterranean Diet and Prevention of Chronic Diseases. Nutrition Today, 52(5), 208-222. https://doi.org/10.1097/NT.0000000000000228