I think mash dal means urad dal,if it is than, as per Ayurveda urad dal and curd or yogurt is not right combination, may be bring same stomach related issues, and as per modern-sci no issues or no restrictions on urad dal and curd products. even others dal also we can eat with curd /yogurt.
Next Steps
if any stomach realated issues going on than before eating tk your doctor advice. or check info with trusted sources.
Health Tips
check trusted source.or eat very less to sea effect on digestion. if ur stomach supporting such combination, than eat In adequate intake. thank you.