Output:
[['Starter', 'Main', 'Dessert', 'Drink']]

Please enter your starter dish :  Thing

Error:
Traceback (most recent call last):
 File "python", line 39, in <module>
 File "python", line 34, in main
 File "python", line 17, in add_data_rows
 File "python", line 9, in get_string_inputs
 File "<string>", line 1, in <module>
NameError: name 'Thing' is not defined

favMeal = []
header = ['Starter','Main','Dessert','Drink']
favMeal.append(header)

print(favMeal)

def get_string_inputs(p):
  
  strData = input("Please enter {0}: ".format(p))
  return strData
  
  
def add_data_rows():
  
  meal_details = [ ]
  
  starter_c = get_string_inputs("your starter dish ")
  meal_details.append(starter_c)
  main_c = get_string_inputs("your main course ")
  meal_details.append(main_c)
  dessert_c = get_string_inputs("your dessert course ")
  meal_details.append(dessert_c)
  drink = get_string_inputs("your drink ")
  meal_details.append(drink)
  return meal_details
  
def main():
  
  
  favMeal= [ ]
  header = ['Starter','Main', 'Dessert', 'Drink']
  favMeal.append(header)
  
  meal_details = add_data_rows()
  favMea.append(meal_details)
  for a,b,c,d in favMeal:
    print('{0:<16} {1:<16} {2:<16} {3:<16}'.format(a,b,c,d))
    
main()

favMea.append(meal_details) # here <<<
  for a,b,c,d in favMeal:
    print('{0:<16} {1:<16} {2:<16} {3:<16}'.format(a,b,c,d))

  favMea.append(meal_details)

  favMeal.append(meal_details)