DateList := @TextToTime(@Explode([01/01/2003-12/31/2003]));

If you want the date range to be a bit more dynamic, you can do that in two statements:

Range := @TextToTime(@Text(@Date(***; ***; ***); "D0S0") + "-" + @Text(@Date(***; ***; ***); "D0S0")));

DateList := @TextToTime(@Explode(Range));

(Remember to substitute the correct computed values for the ***'s to get the dynamic dates)

Once you have the DateList variable populated (it contains multiple values of all the dates), then it's a matter of keeping only the ones with the correct weekday (Monday in our example).

DatePlusWeekday := @Text(DateList) + "%" + @Text(@Weekday(DateList));

@Trim(@Left(DatePlusWeekDay; "%2"))

The first statement above expands on the multiple value DateList variable. DatePlusWeekday will have the date, then a percent sign, then the number of the weekday for each date. The final statement takes everything to the left of the percent sign plus the weekday to keep (2 = Monday). For 6 of every 7 days, the @Left will result in a null value. For the 7th (the Mondays), the @Left will result in the date only (the percent sign and the weekday number will be removed). The @Trim removes all the null values, resulting in just the dates that are Mondays in the date range.